What are the differences between a 6 degree and a 17 degree stem in terms of their impact on bike handling and rider comfort?

A 6-degree stem provides a more upright riding position, which can be more comfortable for some riders and offer better handling in tight turns. A 17-degree stem, on the other hand, offers a more aggressive and aerodynamic riding position, which may improve speed but could be less comfortable for longer rides and may require more precise handling.